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Ch. 4 - Applications of Derivatives
Hass - Thomas' Calculus 15th Edition
Hass15th EditionThomas' CalculusISBN: 9780137616077당신이 사용하는 게 아니라요?교과서 변경
4장, 문제 4.7.15a

Finding Antiderivatives
In Exercises 1–16, find an antiderivative for each function. Do as many as you can mentally. Check your answers by differentiation.
csc x cot x

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1
Recall that an antiderivative (or indefinite integral) of a function is a function whose derivative is the original function. Here, we want to find a function F(x) such that F'(x) = csc x cot x.
Recognize the derivative of a common trigonometric function: the derivative of csc x is -csc x cot x. This is a key insight because it relates directly to the integrand.
Since the derivative of csc x is -csc x cot x, the antiderivative of csc x cot x will be the negative of csc x plus a constant of integration C.
Write the antiderivative as an integral: \(\int csc\ x\ cot\ x\ d x = -csc\ x + C\).
To verify, differentiate your result \(-csc\ x + C\) and check that it equals the original function \(csc\ x\ cot\ x\).

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주요 개념

질문에 올바르게 답하기 위해 반드시 이해해야 하는 핵심 개념들은 다음과 같습니다.

Antiderivatives (Indefinite Integrals)

An antiderivative of a function is another function whose derivative equals the original function. Finding antiderivatives involves reversing differentiation, often represented as indefinite integrals with a constant of integration. For example, if F'(x) = f(x), then F(x) is an antiderivative of f(x).
추천 영상:
가이드 코스
05:04
Introduction to Indefinite Integrals

Trigonometric Functions and Identities

Understanding the properties and derivatives of trigonometric functions like csc(x) and cot(x) is essential. Knowing identities such as cot(x) = cos(x)/sin(x) helps simplify expressions and find antiderivatives. Familiarity with these functions' behavior aids in recognizing patterns during integration.
추천 영상:
가이드 코스
6:04
Introduction to Trigonometric Functions

Verification by Differentiation

After finding an antiderivative, differentiating it should return the original function. This step confirms the correctness of the solution. It reinforces the connection between differentiation and integration, ensuring the antiderivative found is accurate.
추천 영상:
가이드 코스
05:53
Finding Differentials